A250929 Number of (n+1)X(2+1) 0..3 arrays with no 2X2 subblock having a diagonal absolute difference less than its antidiagonal absolute difference

1652, 42776, 1104364, 28564788, 739019204, 19118642332, 494596445284, 12795148116004, 331009178108944, 8563174165025384, 221528446755373556, 5730918403801358436, 148258276841071095144, 3835426560297583949776

Offset

1,1

Comments

Column 2 of A250935

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 40*a(n-1) -475*a(n-2) +3392*a(n-3) -16134*a(n-4) +44165*a(n-5) -44214*a(n-6) -88218*a(n-7) +319624*a(n-8) -393886*a(n-9) +208973*a(n-10) +26874*a(n-11) -121797*a(n-12) +92658*a(n-13) -36825*a(n-14) +5454*a(n-15) +752*a(n-16)

Example

Some solutions for n=2
..2..2..1....3..1..1....2..0..1....0..1..3....2..1..2....0..2..1....3..3..2
..2..0..1....1..1..1....0..1..3....0..1..3....1..3..0....3..2..1....3..3..0
..0..3..3....0..2..3....0..3..3....3..2..0....3..3..0....2..1..0....2..1..1

Crossrefs

Sequence in context: A251897 A251905 A251898 * A054809 A236042 A163273

Adjacent sequences: A250926 A250927 A250928 * A250930 A250931 A250932

Keyword

nonn

Author

R. H. Hardin, Nov 28 2014

Status

approved